식물병연구 (Research in Plant Disease)

한국식물병리학회 (The Korean Society of Plant Pathology)
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감마선 및 화학 대체제 융복합 처리가 백합 잎마름병균 및 잎 절편 감염에 미치는 영향

Effect of Gamma Irradiation and Its Convergent Treatments on Lily Leaf Blight Pathogen, Botrytis elliptica, and the Disease Development

  • Kim, Ji-Hoon (Department of Biomedical Sciences, Sun Moon University) ;
  • Yun, Sung-Chul (Department of Biomedical Sciences, Sun Moon University)
  • 투고 : 2014.03.03
  • 심사 : 2014.05.16
  • 발행 : 2014.06.30
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초록

감마선과 융복합 처리를 위한 은나노 입자(NA, NSS), 이염화이소시안산나트륨(NaDCC) 등의 화학대체제를 이용하여 백합잎마름병의 원인균인 Botrytis elliptica의 포자발아 및 균사생장 억제와 동시에 백합 잎 절편에서 발병 과정 중 방제를 연구하였다. 발병과정에서 감마선 융복합 처리효과를 알아보기 위한 실험은 곰팡이 침입을 인위적으로 도와주는 상처접종과 병원균 스스로 침입을 하는 분무접종 두 가지를 실시하였다. 병원균 곰팡이 포자 발아를 90%까지 억제시킬 수 있는 감마선 선량인 $D_{10}$은 526 Gy였다. 2000 Gy까지 감마선 선량을 병원균 균사에 조사한 후, 16, 19, 22, 25, $28^{\circ}C$에서 배양한 결과 곰팡이 균사는 가장 높았던 2000 Gy에서도 죽지 않고 생장이 약 1-2일 지연되었을 뿐이었다. 백합 잎마름병을 억제하기 위해 필요한 1-2 kGy의 감마선 처리는 절화백합에서 부작용이 보일만큼 너무 높기 때문에 감마선은 200 Gy로 조사하고 다른 화학대체제들과의 융복합 처리하는 방안을 강구하였다. 다양한 화학대체제들의 융복합 처리 농도를 $40{\mu}g/l$로 맞춘 이유는 화학제만으로 병원균을 완전히 죽이지 않으면서 감마선의 살균 효과를 거둘 수 있기 때문이었다. 병원균 포자 발아 융복합 실험에서 $40{\mu}g/l$의 NaDCC 처리는 무처리에 비해 포자발아를 1000배 이하로 줄일 수 있었다. 감마선만 처리한 실험에서 방제가는 상처접종에서 23%, 분무접종에서 19.5%로 기대만큼 높지 않았다. 상처접종에서 감마선 처리하지 않은 NaDCC 단독처리의 방제가는 89%였던 반면, NaDCC와 200 Gy 융복합 처리는 32%에 불과하였다. 자연상태에 더 가까운 분무접종 실험에서 NaDCC 단독처리의 방제가는 50%, NaDCC와 200 Gy의 감마선 융복합 처리 방제가는 24%였다.

Gamma irradiation and its convergence with nano-silver particles and sodium dichloroisocyanurate (NaDCC) were investigated to inhibit germination and mycelial growth of Botrytis elliptica, the pathogen of lily leaf blight. In addition, the same treatments were studied on the process of disease development with detached leaf of lily cv. Siberia. Spray inoculation, which is closer to natural infection than wound inoculation, can be a way to investigate infection ability of the treated pathogen. The irradiating dose required to reduce the population by 90%, $D_{10}$, was 526 Gy irradiating with 0-2000 Gy gamma ray on the conidial suspension as well as the growing mycelia. Even at 2000 Gy, the mycelium was not killed but just delayed its growth at 1-2 days behind. Convergent treatment with 40 mg/l of NaDCC just before 200 Gy gamma irradiation was the best way to decrease the conidial germination about 1/1000 times. The control values of gamma irradiation were 23% and 19.5% at wound inoculation and spray inoculation, respectively. On wound-inoculation, the control value of NaDCC only was 89%, and that of NaDCC convergent with 200 Gy gamma irradiation was 32%. On sprayinoculation, the highest control value was NaDCC at 50%, and that of NaDCC convergent with gamma irradiation was 24%.

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  3. Applications of ionizing radiation for the control of postharvest diseases in fresh produce: recent advances 2017, https://doi.org/10.1111/ppa.12739
  4. Controlling Botrytis elliptica Leaf Blight on Hybrid Lilies through the Application of Convergent Chemical X-ray Irradiation vol.32, pp.2, 2016, https://doi.org/10.5423/PPJ.OA.09.2015.0187
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